Archive of PC Enterprises hardware mods, software, and dumped ROMs?
PC Enterprises was a company that specialized in upgrades for odd PCs like the PCjr and some of the PS/2 models. Their fanciest, highest priced items were 486 upgrade motherboards for some PS/2 models.
For the PCjr they sold some hardware mod kits. One was (IIRC) $14 for a kit to enable support for Tandy 1000 video. Turned out to be just a piece of wire, a common 7400 series TTL chip, and instructions on a trace to cut and where to solder the chip and wires. I then took chips off a dead IBM XT board to mod a few other PCjrs. IBM Canada at one point published this hack on their website.
They also had a Tandy sound mod kit but I wasn't going to be fooled again. I figured the info had to be out there, somewhere. I never found it. There's a small program that can be run to switch the sound to Tandy mode, but the hardware mod would use no memory and have no possibility of software conflicts. the video mode mod just works transparently. Software that wants PCjr video works, software that wants Tandy 1000 video works, the user doesn't have to do a thing other than select the supported mode in each program. There was only one game I ever ran into that flat out refused to use Tandy Video when it couldn't detect Tandy Sound. Some Hoyle card game program, so I was tuck playing it in 4 color CGA instead of 320x200x16 color.
The big benefit was a lot of software with low resolution 16 color EGA mode had support for either PCjr or Tandy 1000 since the resolution and colors were the same.
The company also sold a series of enhancement cartridges for the PCjr which added various functions. ROM dumps of them would enable copies to be made since new ones haven't been made for a couple decades or more.
Another mod was the "Thin Font" which forced the built in CGA to switch to the alternate "secret" font IBM included then made inaccessible. Or was it in a ROM chip that was added in the PCE product? IIRC the other font is built in to genuine IBM CGA cards. There was a wire that had to be clipped onto a pin somewhere and a switch to install.
They also had some software, and sidecars for VGA video, Soundblaster and more.
All of it should be archived and documented to preserve it and where possible, reproduce it.